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    CVE-2009-4146

    The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147.

    Published:Dec 2, 2009
    Last Modified:Apr 23, 2026
    EPS:Dec 2, 2009
    EPSS Score:0.1817
    CVSS Score:7.2

    Affected Products

    Vendor
    Freebsd
    Product
    Freebsd

    Exploits

    http://people.freebsd.org/~cperciva/rtld.patchhttp://www.securityfocus.com/bid/37154http://people.freebsd.org/~cperciva/rtld.patchhttp://www.securityfocus.com/bid/37154https://www.exploit-db.com/exploits/10255

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-58094 (CVSS 7.8) — The FIOSSHMLPGCNF ioctl(2) operation configures the page size for a largepage shared memory object. This is i…
    CVE-2026-58093 (CVSS 7) — The TIOCSCTTY ioctl handler drops the tty lock in order to acquire the process tree lock. After reacquiring t…
    CVE-2026-58097 (CVSS 7.8) — mp_SetEnddisc() copied a user-supplied PSN endpoint value without length validation, allowing a buffer overflo…
    CVE-2026-58096 (CVSS 8.8) — LcpDecodeConfig() did not validate the length of received endpoint discriminator options against the minimum r…
    CVE-2026-58095 (CVSS 8.8) — mp_Enddisc() used incorrect length calculations when formatting endpoint discriminator addresses for display, …
    CVE-2026-58092 (CVSS 8.1) — In FreeBSD 15.0, the kernel structure used to represent user credentials changed: previously the primary group…
    CVE-2026-58091 (CVSS 7.8) — The implementation of this ioctl attempts to acquire locks on all channels in a sync group. If locking a chan…
    CVE-2026-58090 (CVSS 7.8) — The SOCK_STREAM receive path in the unix socket implementation failed to fully detach control messages from th…
    CVE-2026-58089 (CVSS 7.8) — When a process calls execve(2) to execute a setuid or setgid image, hwpmc(4) is supposed to detach PMCs owned …
    CVE-2026-58088 (CVSS 7.4) — The ELF core dump code counted the number of dumpable VM map entries, allocated a buffer for the corresponding…

    References

    http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html
    http://people.freebsd.org/~cperciva/rtld.patch
    http://secunia.com/advisories/37517
    http://www.securityfocus.com/archive/1/508142/100/0/threaded
    http://www.securityfocus.com/archive/1/508146/100/0/threaded
    http://www.securityfocus.com/archive/1/508168/100/0/threaded
    http://www.securityfocus.com/bid/37154
    http://www.securitytracker.com/id?1023250
    http://packetstormsecurity.com/files/152997/FreeBSD-rtld-execl-Privilege-Escalation.html
    http://people.freebsd.org/~cperciva/rtld.patch
    http://secunia.com/advisories/37517
    http://www.securityfocus.com/archive/1/508142/100/0/threaded
    http://www.securityfocus.com/archive/1/508146/100/0/threaded
    http://www.securityfocus.com/archive/1/508168/100/0/threaded
    http://www.securityfocus.com/bid/37154
    http://www.securitytracker.com/id?1023250

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High